CN1022946C - Hydraulic assembly - Google Patents
Hydraulic assembly Download PDFInfo
- Publication number
- CN1022946C CN1022946C CN90107402A CN90107402A CN1022946C CN 1022946 C CN1022946 C CN 1022946C CN 90107402 A CN90107402 A CN 90107402A CN 90107402 A CN90107402 A CN 90107402A CN 1022946 C CN1022946 C CN 1022946C
- Authority
- CN
- China
- Prior art keywords
- cylinder
- pump
- volume
- piston
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/18—Combined units comprising both motor and pump
Abstract
A power unit essentially consisting of a pump (2) and a cylinder (1) for driving a tool has a high-pressure space (1a) and two low-pressure spaces. The high-pressure space (1a) and the first low-pressure space (1b) are separated from one another by a piston (10). The second low-pressure space serves solely as a compensating volume (1c), the volume of the compensating space (1c) corresponding to at least the sum of the displacement volume of the piston rod (11) moved fully into the cylinder housing (15), the compression volume of the hydraulic fluid, and the stroke volume of the pump (2).This design can provide an entire compact unit which requires no additional accumulator for the hydraulic medium but in which it is nonetheless ensured that even a simple construction of the pump (2) feeding the cylinder can draw in hydraulic fluid in any position of the unit. Furthermore, a hydraulic circuit for controlling the power unit is described in which the low-pressure line (7') branches in front of the reversing valve (3) and is taken up to the compensating space (1c).
Description
The present invention relates to a kind of hydraulic pressure unit that is used to the instrument that drives.
As applied in the rescue technology, with the cutter concurrent operation time, must in the structure space of a minimum, be provided with one by oil hydraulic cylinder, pump, valve, the effective complete equipment that used cutting/stretching, extension (spreiz) instrument is formed, and utilize this equipment can obtain maximum power.
Utilize a manual pump to drive oil hydraulic cylinder with moving member.Because significantly less than the actual volume of cylinder, must providing in the middle of one, the piston swept volume of pump connects the hydraulic fluid of cylinder to make the usefulness of driving.This kind unit is by the title mass selling of Anmelderin with Lukas LKS35.
Need be except because of separating working equipment than the large space, also has such shortcoming, that is: equipment can not start the position arbitrarily at each, and only when hydraulic fluid covers pump intake, work, in other words, just when usually being to get rid of when dropping into rescue comparatively roughly to have lost the valuable time; To such an extent as to must seek to the suitable position of equipment operation, so that adjust equipment reliably, make pump not suck air, or the like.
German patent DE-OS3603109 discloses a kind of hydraulic pressure manual pump, and it is used to handle cable termination press machine and other Hydraulic power tools.At this moment, clutch release slave cylinder and oil hydraulic pump coaxially are arranged in the same casing.This clutch release slave cylinder has a hyperbaric chamber, and manual pump is made up of a low pressure (LP) cylinder, and a low pressure piston is slidably arranged in this cylinder.One high pressure piston is arranged in the concentric hole of a low pressure piston, and this high pressure piston forms a limiter (Begrenzung) that is in the high-pressure cylinder of low pressure piston.Before pump, in casing, be provided with (on average) pressure storage container in the middle of (Druckmittelvorratsbeha " lter), this container by the barrier film institute of an activity every, and the low pressure chamber connection by a valve and manual pump.That this container has is enough, promote the necessary volume of Hydraulic power tools by means of hydraulic fluid.The setting of the barrier film in container can make at arbitrary position of unit pump at the end air-breathing, is always surrounded by hydraulic fluid, therefore can not suck air.Because the enough swept volumes in the essential configuration storage container are so this pump is also higher to the requirement in space.As essential in rescue equipment, for obtaining bigger power, the stroke of cylinder must be longer, so, also does longlyer by this unit of German patent DE-OS3603109, feels difficulty to cause the operator when operating.
The present invention promptly adopts a kind of hydraulic pressure unit that is used to the instrument that drives based on following task, its form that is of compact construction, and can produce big active force, and, utilize this unit can guarantee pump to be aspirated reliably in arbitrary position of complete equipment.
This task is to finish by the feature that claim 1 shows.By the cylinder chamber being divided into a low pressure chamber and a hyperbaric chamber by a piston, one of them chamber is enlarged and another chamber just dwindles, and, one second low pressure chamber is set, the balance cylinder of the corresponding hydraulic fluid scale of construction of swept volume of the volume that it is only replaced out with the piston rod of opposing and stretched into, the minimum cylinder volume of hydraulic fluid and pump can fully phase out an independent storage container like this.Only depend on the hydraulic fluid that is in the low pressure chamber to drive.
Below, by means of accompanying drawing the present invention is done one and elaborate, wherein accompanying drawing is:
Fig. 1, the group shot of graphic representation one unit, wherein the double-action differential cylinder is in base position;
Fig. 2 is the presentation graphs according to Fig. 1, and wherein the double-action differential cylinder is in loaded state completely;
Fig. 3 is the another presentation graphs according to Fig. 1, and wherein the double-action differential cylinder is in the initial state of unloading; And
Fig. 4 is a partial view, the another embodiment of expression double-action differential cylinder.
Double-action differential cylinder 1 and reciprocating pump 2 are installed on the same casing 15.Obviously, also can adopt the casing of two separation.
Functional for complete equipment, suppose: two- piston 10,22 has occupied the extraction position, just injected in the 1c of balance cylinder that one is additional, with the corresponding hydraulic fluid scale of construction of minimum cylinder volume of hydraulic fluid.
In double-action differential cylinder 1, installed a piston 10 that links to each other with a piston rod of from casing 15, pulling out 11 slidably.One circular groove 19 is arranged on this piston 10, a seal ring 24 is housed therein, like this, all there are two the different variable 1a of pressure chamber, 1b the both sides in every instantaneous position of piston 10 in cylinder body 15.
The 1a of pressure chamber that is filled with high pressure is limited by piston pin 10a and cylinder body, and the 1b of pressure chamber that is filled with low pressure is surrounded by the piston body 10b and the dividing plate 16 of working in cylinder 1.Between this dividing plate 16 and the cylinder cap 9 spacing is arranged, and and this cylinder cap form a confined space that is arranged in double-action differential cylinder 1.Between dividing plate 16 and cylinder cap 9, be provided with a barrier film 18, so that can produce a variable 1c of balance cylinder by barrier film 18 and dividing plate 16.The 1a of pressure chamber, 1b link to each other with a pump 2 with 7 effectively by hydraulic pressure branch road 6, and promptly branch road 6 is the low pressure branch road for high pressure branch road branch road 7.The low pressure branch road 8 that is provided with in cylinder body 15 flows among the 1c of balance cylinder.
At an end of the piston rod 11 that deviates from piston 10, there is a stretcher (spreizer) that only partly shows to be fixed on two connecting rods 25,26, make when piston rod 11 enters cylinder 1, lever 27,28 is just opened.Pump 2 belongs to a kind of common reciprocating pump, and its piston swept volume is less than the piston swept volume of double-action differential cylinder 1.In the cylinder chamber 21 of pump 2, on pump piston 22, utilize the method for knowing to load onto a seal ring 29 slidably.Deviating from an end of piston 22 at the piston rod 23 that is fixed on the pump piston 22, a hinged pump handle 30 be housed, this pump handle by be positioned at approximately on it its longitudinally the slotted hole of midpoint (31) on a pin 32 that is installed on the housing, move slidably.The selection of the size of reciprocating pump 2 should so determine, promptly with great pump stroke cylinder 1 entered the cylinder from piston and be in maximum position when being pulled away from cylinder body.
High pressure branch road 6 and low pressure branch road 7 lead to the selector valve 3 that constitutes 4/2 directional control valve from cylinder 1, force feed pipeline 6 ' and oil-absorbing pipeline 7 ' be combined as whole safety check 4 and 5 from selector valve 3 processes at this, lead to pump 2.For this reason, safety check 4 and 5 is settings like this, even liquid can only pass through oil-absorbing pipeline 7 ' inflow pump 2, and also can only pass through force feed pipeline 6 ' flow out from pump 2.Low pressure branch road 8 from oil-absorbing pipeline 7 ' turn round, then, as previously mentioned, feeds among the 1c of balance cylinder between safety check 4 and selector valve 3 again.
Describe the working method of said apparatus structure below in detail:
The double-action differential cylinder 1 that Fig. 1 represents is in base position, and in the case, piston 10 does not still have the road that retreats, and is in position of rest.
The operation of selector valve 3 should make: hydraulic fluid, is flowed among the hyperbaric chamber 1a of cylinder 1 by pipeline 6 through safety check 5 or force feed pipeline 6 ' inflow pipeline 6 from pump 2 again.
To pump 2 pressurizations, utilize each compression stroke (along the pressurization of K direction) by constantly, the hydraulic fluid that at every turn is in the pressure chamber 21 is flowed among the hyperbaric chamber 1a of cylinder 1, the piston 10 shown in the figure is moved right.Meanwhile, formed certain pressure in the pressure chamber 21 owing to pump 2 safety check 4 cut out, so the liquid of a constant volume of being squeezed by piston 10 is just from low pressure chamber 1b, through branch road 7,7 ' and bypass passage 8 flow into the 1c of balance cylinder.
When compression stroke stops, barrier film 18 has occupied position as shown in phantom in Figure 1, at this moment, surround the volume that forms by barrier film 18 and dividing plate 16, the volume that is equivalent to pump 2 pump pressures adds by piston rod 11 and is immersed in that part of volume that squeezes among the 1a of cylinder chamber, deducts the difference of the minimum cylinder volume of hydraulic fluid again.For the minimum cylinder volume of the essential additional hydraulic fluid in the 1a of cylinder chamber of build-up pressure, again can from the 1c of balance cylinder mend into.On the other hand, because barrier film 18 takes place effectively to be communicated with by ventilating hole 17 and atmosphere, in branch road 7,7 ' with 8, only the pressure that puts on the hydraulic fluid of the tension force of reliable barrier film works.When the internal stress (Eigenspannkraft) of barrier film 18 is not applied, can add a pressure spring 14, the one end is against on the cylinder cap 9, and its other end is supported in (see figure 4) on the side that deviates from the 1c of balance cylinder of barrier film 18.When the intake stroke (along the S direction) of the pump of following 2, safety check 4 is opened, and makes the liquid that is in the constant volume among the 1c of balance cylinder, process branch road 8,7 ' and, turn back in the pressure chamber 21 of pump 2.Meanwhile, spring-loaded valve 5 is high pressure branch road 6 ' blocking-up, makes piston 10 remain in it at that time on the original position.Such process remains to piston 10 always and enters its end position as shown in Figure 2, and 27,28 of stretch are opened fully.
If then carry out intake stroke, then the volume of the hydraulic fluid in the 1c of the balance cylinder volume that equals to immerse fully the piston rod 11 among the 1a of pressure chamber deducts minimum cylinder volume.This part hydraulic fluid scale of construction that is arranged in the 1c of balance cylinder enough makes piston 10 can move into its another end position once more fully, because the maximum of hyperbaric chamber 1a can be held the volume that the volume (right-hand piston end position) of hydraulic fluid adds upper piston rod 11, add the minimum cylinder volume of hydraulic fluid, less than the maximum volume (left piston end position) of low pressure chamber 1b.
So, equation can be arranged:
Vla＝Vlb-Vkst+Vkomp
In the formula:
The maximum that Vla-piston 10 enters the hyperbaric chamber 1a when being in loaded state fully can be held the volume of hydraulic fluid;
The volume of the low pressure chamber 1b of Vlb-when piston rod is pulled out (base position) fully;
The volume of Vkst-when piston rod enters fully;
The minimum cylinder volume of Vkomp-hydraulic fluid.
By the commutation of selector valve 3, flow direction break-in branch road 6 and 7 now by means of the compression stroke each time of the piston 22 of pump 2, make hydraulic medium flow into low pressure chamber 1b, and the piston 10 of cylinder 1 is shifted to its base position (being moved to the left as figure).Except the structural type of cylinder than the compactness, in addition, barrier film 18 also guarantees to make: for sucking outlet that play a decisive role, that be in the low pressure branch road 8 among the 1c of balance cylinder reliably, can be surrounded by hydraulic fluid in arbitrary position of cylinder 1, reciprocating pump 2 can constantly aspirate thus.
The working method of unit can be set forth clear by a stretching tool.Certainly, also can use the stretching one cutting instrument of a cutting instrument or a combination.When the working position of as shown in Figure 3 selector valve 3, in the 1b of cylinder chamber, also can set up high pressure, like this, then cylinder chamber 1a leads to low pressure chamber, and branch road 6 leads to the low pressure branch road.When the result outwards pulls out when piston rod 11, just the instrument powerful ground admission of closure is impacted.
Claims (1)
1, a kind of hydraulic pressure unit that is used to the instrument that drives, it consists essentially of a double-action differential cylinder 1, one stretches out with driving tool 25 to a side from oil cylinder 1,26,27, the piston rod 11 of 28 usefulness, the piston 10 that links to each other with piston rod 11 is divided into two 1a of pressure chamber with cylinder cavity, 1b, with oil cylinder 1 1b of pressure chamber, in the oil-absorbing pipeline 7,7 ' that the pressure chamber 21 of pump 2 is communicated with, a safety check 4 and a selector valve 3 have been linked in sequence, two 1a of pressure chamber, 1b by selector valve 3 selectively respectively with the force feed pipeline 6 of pump 2 ' or oil-absorbing pipeline 7 ' be communicated with, and oil-absorbing pipeline 7 ' be communicated with the 1c of balance cylinder; In the 1c of balance cylinder, be provided with a barrier film 18,
It is characterized in that:
-between selector valve 3 and safety check 4, oil-absorbing pipeline 7 ' is connected with the 1c of balance cylinder of oil cylinder 1 by pipeline 8;
The volume of the 1c of-balance cylinder is equivalent to be entered fully volume, the minimum cylinder volume of hydraulic fluid and the swept volume sum of pump 2 that the piston rod 11 in the cylinder body 15 replaces at least;
1c of-balance cylinder and the 1b of pressure chamber coaxially are arranged in the cylinder body 15 and by a dividing plate that is pressed into 16 and separate;
-dividing plate 16 is made of an embolism that screws in the cylinder body 15;
A side that deviates from dividing plate 16 of-barrier film 18 is by stage clip 14 pressurizations, and this side of barrier film is communicated with effectively with atmosphere; And
-differential cylinder 1 and pump 2 are placed in the cylinder body 15 together.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3932354.4 | 1989-09-28 | ||
| DE3932354 | 1989-09-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1050595A CN1050595A (en) | 1991-04-10 |
| CN1022946C true CN1022946C (en) | 1993-12-01 |
Family
ID=6390364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90107402A Expired - Fee Related CN1022946C (en) | 1989-09-28 | 1990-08-29 | Hydraulic assembly |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5105622A (en) |
| EP (1) | EP0419810B1 (en) |
| JP (1) | JP2736336B2 (en) |
| KR (1) | KR0180720B1 (en) |
| CN (1) | CN1022946C (en) |
| DE (1) | DE59002832D1 (en) |
| PL (1) | PL164839B1 (en) |
| RU (1) | RU1838229C (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5251445A (en) * | 1991-10-03 | 1993-10-12 | Hydra-Ram Inc. | Hand operated hydraulic pump having pressurized reservoir within piston |
| GB2277354A (en) * | 1993-03-15 | 1994-10-26 | Scanlan Thomas Robert | Hydraulic piston and cylinder assembly |
| DE4340142C2 (en) * | 1993-11-25 | 1995-11-23 | Abb Patent Gmbh | Hydraulic device for actuating at least one linearly movable component |
| DK153197A (en) * | 1997-12-23 | 1999-06-24 | Anders Sten Wedell | Hydraulic unit |
| NL1014253C2 (en) * | 2000-02-01 | 2001-08-02 | Holmatro Ind Equip | Manually-operated hydraulic tool with piston and actuator aligned on longitudinal axis |
| DE102004037697B4 (en) * | 2004-08-02 | 2006-10-19 | Andreas Lupold Hydrotechnik Gmbh | hydraulic equipment |
| JP5185107B2 (en) * | 2005-04-28 | 2013-04-17 | ベスローテン・フェンノートシャップ・ホルマトロ・インダストリアル・イクウィップメント | Tool with hydraulic valve system |
| DE102005060436B4 (en) * | 2005-12-15 | 2010-02-04 | Eads Deutschland Gmbh | actuator |
| DE102006013615A1 (en) * | 2006-03-22 | 2007-09-27 | Andreas Lupold Hydrotechnik Gmbh | Hydraulic aggregate with fast lifting piston e.g. for rescue cutter, has common housing for pump unit and valve unit which has tank connection and power port |
| CN100344942C (en) * | 2006-04-03 | 2007-10-24 | 浙江大学 | Oil container for measuring oil volume changing |
| DE102011009044B4 (en) | 2011-01-20 | 2015-09-10 | Lukas Hydraulik Gmbh | venting device |
| DE102013108776A1 (en) | 2013-08-13 | 2015-02-19 | Daniel Bormann | Mobile tool, in particular rescue device, for destroying a structural component |
| CN105782165B (en) * | 2014-12-24 | 2017-09-01 | 大连光洋科技集团有限公司 | A kind of unpowered pressurize telescoping cylinder and its binding clasp of application |
| DE202015009395U1 (en) | 2015-01-26 | 2017-06-09 | Lukas Hydraulik Gmbh | Hydraulic implement |
| CN108025198B (en) | 2015-01-26 | 2019-04-19 | 鲁卡斯液压有限公司 | Hydraulic instrument |
| DE202015009638U1 (en) | 2015-01-26 | 2018-09-18 | Lukas Hydraulik Gmbh | Hydraulic implement |
| CN104743101B (en) * | 2015-03-30 | 2016-08-17 | 中国民用航空飞行学院 | Navigation undercarriage extension and retraction system |
| DE102016102960A1 (en) | 2016-02-19 | 2017-08-24 | Viega Technology Gmbh & Co. Kg | Apparatus and method for translating a mechanical force to drive a pressing device for press fittings |
| CN106272135A (en) * | 2016-08-27 | 2017-01-04 | 刘雷 | A kind of multifunctional superhigh pressure Manual hydraulic grip |
| CN112548898B (en) * | 2020-12-02 | 2022-05-10 | 深圳市铭仁塑胶模具有限公司 | Auxiliary fixing device for finish machining of injection mold part cavity hole |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2372393A (en) * | 1945-03-27 | Control system | ||
| US3875850A (en) * | 1972-08-30 | 1975-04-08 | Applied Power Inc | Double-acting lift cylinder with integral velocity fuses |
| DE2336249A1 (en) * | 1973-07-17 | 1975-02-06 | Hydraulik Zubehoer Ges Fuer | Hydraulic power unit - has hydropump, hydraulic fluid reservoir, and power cylinder built into one assembly |
| DE2410766C3 (en) * | 1974-03-07 | 1983-01-13 | Danfoss A/S, 6430 Nordborg | Adjusting device with an axial adjusting motor, in particular for actuating gas heating valves |
| DE2524005A1 (en) * | 1975-05-30 | 1976-12-09 | Siemens Ag | Railway double acting cylinder control - uses reversible motor to drive pump which operates in only one direction |
| DE2630226A1 (en) * | 1976-07-06 | 1978-01-19 | Cis Metalform Masch | ARRANGEMENT ON WORK CYLINDERS |
| DE2757467A1 (en) * | 1977-12-22 | 1979-07-05 | Weber Oelhydraulik | DEVICE FOR SWIVELING A ROTATING PLOW |
| US4343228A (en) * | 1979-01-25 | 1982-08-10 | Wallis Bernard J | Hydraulic cylinder arrangement |
| FR2489897A1 (en) * | 1980-09-10 | 1982-03-12 | Leduc Rene Hydro Sa | Self contained hydraulic actuator unit - has electric motor, hydraulic pump, and reservoir in cylindrical housing and hydraulic cylinder and valve in attached housing |
| US4513979A (en) * | 1983-03-24 | 1985-04-30 | The Warner & Swasey Company | Machine tool with chucking controls |
| DE3603109A1 (en) * | 1986-02-01 | 1987-08-06 | Dischler Helmut | HYDRAULIC HAND PUMP FOR ACTUATING CABLE SHOE PRESSES AND OTHER HYDRAULIC TOOLS |
-
1990
- 1990-08-02 DE DE90114822T patent/DE59002832D1/en not_active Expired - Fee Related
- 1990-08-02 EP EP90114822A patent/EP0419810B1/en not_active Expired - Lifetime
- 1990-08-29 CN CN90107402A patent/CN1022946C/en not_active Expired - Fee Related
- 1990-09-06 KR KR1019900014072A patent/KR0180720B1/en not_active IP Right Cessation
- 1990-09-19 JP JP2247658A patent/JP2736336B2/en not_active Expired - Fee Related
- 1990-09-21 PL PL90286996A patent/PL164839B1/en unknown
- 1990-09-26 US US07/588,366 patent/US5105622A/en not_active Expired - Lifetime
- 1990-09-28 RU SU904831344A patent/RU1838229C/en active
Also Published As
| Publication number | Publication date |
|---|---|
| EP0419810A1 (en) | 1991-04-03 |
| KR0180720B1 (en) | 1999-04-15 |
| DE59002832D1 (en) | 1993-10-28 |
| US5105622A (en) | 1992-04-21 |
| KR910006625A (en) | 1991-04-29 |
| EP0419810B1 (en) | 1993-09-22 |
| CN1050595A (en) | 1991-04-10 |
| RU1838229C (en) | 1993-08-30 |
| JP2736336B2 (en) | 1998-04-02 |
| PL164839B1 (en) | 1994-10-31 |
| JPH03121714A (en) | 1991-05-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |